I just received a genuine Soviet Plum AK74 mag that I won on Gunbroker. I payed a total of $55, including shipping.  It is in good shape, with only the sort of wear one should expect from a fairly old milsurp magazine.  Also, the arsenal mark has been removed, but that's fairly normal for these mags per my understanding. It does, however, retain the silver ink stamps which include an E in between the top two ribs on the left side.  Did I do alright? I assumed $55 shipped was pretty good for the real deal to go with my k-var plum furniture and Russian plum bayo on my Krebs '74.

That's good to hear. I never seem to get actual "deals" on anything, so this is a nice change.